Nuclear shapes from spectroscopic studies of fission fragments [electronic resource]

Partial level schemes for several neutron-rich Ba and Ce nuclei have been determined from the study of gamma-gamma coincidences in ²⁵²Cf fission fragments. The experiment was performed with the Argonne-Notre Dame gamma ray facility, which consisted of 7 Compton- suppressed Ge detectors, a low-energy...

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Bibliographic Details
Online Access: Online Access
Corporate Author: Argonne National Laboratory (Researcher)
Format: Government Document Electronic eBook
Language:English
Published: Argonne, Ill. : Oak Ridge, Tenn. : Argonne National Lab ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1989.
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MARC

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245 0 0 |a Nuclear shapes from spectroscopic studies of fission fragments  |h [electronic resource] 
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300 |a Pages: 6 :  |b digital, PDF file. 
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500 |a Published through the Information Bridge: DOE Scientific and Technical Information. 
500 |a 01/01/1989. 
500 |a "conf-890406-1" 
500 |a "DE89000597" 
500 |a Fifty years with nuclear fission conference, Gaithersburg, MD, USA, 25 Apr 1989. 
500 |a Phillips, W.R.; Holzmann, R.; Janssens, R.V.F.; Khoo, T.L.; Ahmad, I.; Drigert, M.W.; Emling, H. 
520 3 |a Partial level schemes for several neutron-rich Ba and Ce nuclei have been determined from the study of gamma-gamma coincidences in ²⁵²Cf fission fragments. The experiment was performed with the Argonne-Notre Dame gamma ray facility, which consisted of 7 Compton- suppressed Ge detectors, a low-energy photon spectrometer and an inner ball of fourteen hexagonal BGO detectors. Gamma-gamma coincidence events between the Ge detectors, which were accompanied by a gamma in BGO detectors, were accepted. The triple coincidence requirement eliminated most of the beta-decay background. Transitions in individual Ba and Ce nuclei were identified by gating on the known 2⁺ ..-->.. O⁺ gamma rays. Level schemes deduced from these studies indicate interleaved negative and positive parity levels in ¹⁴⁴Ba, ¹⁴⁶Ba and ¹⁴⁶Ce which are connected by fast E1 transitions. Both these features are signature of octupole deformation (reflection asymmetric shape) and are reproduced by recent theoretical calculations. 4 refs., 1 fig., 1 tab. 
536 |b W-31109-ENG-38. 
650 7 |a Beta Decay Radioisotopes.  |2 local. 
650 7 |a Heavy Nuclei.  |2 local. 
650 7 |a Barium Isotopes.  |2 local. 
650 7 |a Alkaline Earth Isotopes.  |2 local. 
650 7 |a Deformation.  |2 local. 
650 7 |a Beta-minus Decay Radioisotopes.  |2 local. 
650 7 |a Even-even Nuclei.  |2 local. 
650 7 |a Fission Fragments.  |2 local. 
650 7 |a Actinide Isotopes.  |2 local. 
650 7 |a Millisec Living Radioisotopes.  |2 local. 
650 7 |a Isotopes.  |2 local. 
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650 7 |a Mean-field Theory.  |2 local. 
650 7 |a Barium 144.  |2 local. 
650 7 |a Barium 142.  |2 local. 
650 7 |a Intermediate Mass Nuclei.  |2 local. 
650 7 |a Nuclear Fragments.  |2 local. 
650 7 |a Alkali Metal Isotopes.  |2 local. 
650 7 |a Californium Isotopes.  |2 local. 
650 7 |a Odd-odd Nuclei.  |2 local. 
650 7 |a Cesium 146.  |2 local. 
650 7 |a Cesium Isotopes.  |2 local. 
650 7 |a Minutes Living Radioisotopes.  |2 local. 
650 7 |a Californium 252.  |2 local. 
650 7 |a Nuclear Structure.  |2 local. 
650 7 |a Actinide Nuclei.  |2 local. 
650 7 |a Seconds Living Radioisotopes.  |2 local. 
650 7 |a Alpha Decay Radioisotopes.  |2 local. 
650 7 |a Nuclei.  |2 local. 
650 7 |a Years Living Radioisotopes.  |2 local. 
650 7 |a Radioisotopes.  |2 local. 
650 7 |a Nuclear Physics And Radiation Physics.  |2 edbsc. 
710 2 |a Argonne National Laboratory.  |4 res. 
710 1 |a United States.  |b Department of Energy.  |b Office of Scientific and Technical Information.  |4 dst. 
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